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Volumn 130, Issue 3, 2008, Pages 810-811

The catalytic asymmetric total synthesis of elatol

Author keywords

[No Author keywords available]

Indexed keywords

ALPHA CHAMIGRENE; APLYDACTONE; BETA CHAMIGRENE; CHAMIGRENE; ELATOL; JOHNSTONOL; LAURENCENONE B; LAURENCENONE C; LIGAND; MAJUSCULONE; NATURAL PRODUCT; OBTUSOL; PALLADIUM; SESQUITERPENE; UNCLASSIFIED DRUG; VINYL CHLORIDE;

EID: 38349159026     PISSN: 00027863     EISSN: None     Source Type: Journal    
DOI: 10.1021/ja710294k     Document Type: Article
Times cited : (161)

References (37)
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    • Originally isolated from the marine alga Laurencia elata: Sims, J. J.; Lin, G. H. Y.; Wing, R. M. Tetrahedron Lett. 1974, 15, 3487-3490.
    • Originally isolated from the marine alga Laurencia elata: Sims, J. J.; Lin, G. H. Y.; Wing, R. M. Tetrahedron Lett. 1974, 15, 3487-3490.
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    • 50 = 2.4 mM (lag phase), 2.0 mM (log phase); Dias, T.; Brito, I.; Moujir, L.; Paiz, N.; Darias, J.; Cueto, M. J. Nat. Prod. 2005, 68, 1677-1679.
    • 50 = 2.4 mM (lag phase), 2.0 mM (log phase); Dias, T.; Brito, I.; Moujir, L.; Paiz, N.; Darias, J.; Cueto, M. J. Nat. Prod. 2005, 68, 1677-1679.
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    • For the preparation of elatol (1) via the degradation of iso-obtusol, see: (a) González, A. G.; Darias, J.; Díaz, A.; Fourneron, J. D.; Martín, J. D.; Pérez, C. Tetrahedron Lett. 1976, 17, 3051-3054.
    • For the preparation of elatol (1) via the degradation of iso-obtusol, see: (a) González, A. G.; Darias, J.; Díaz, A.; Fourneron, J. D.; Martín, J. D.; Pérez, C. Tetrahedron Lett. 1976, 17, 3051-3054.
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    • For lead references on the total syntheses of other chamigrene natural products, see: a
    • For lead references on the total syntheses of other chamigrene natural products, see: (a) Taber, D. F.; Sikkander, M. I.; Storck, P. H. J. Org. Chem. 2007, 72, 4098-4101.
    • (2007) J. Org. Chem , vol.72 , pp. 4098-4101
    • Taber, D.F.1    Sikkander, M.I.2    Storck, P.H.3
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    • (d) Hatsui, T.; Wang, J.-J.; Takeshita, H. Bull. Chem. Soc. Jpn. 1994, 67, 2507-2513. Also see ref 3c.
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    • For the preparation of trisubstituted chloroalkenes via RCM, see: a
    • For the preparation of trisubstituted chloroalkenes via RCM, see: (a) Chao, W.; Weinreb, S. M. Org. Lett. 2003, 5, 2505-2507.
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    • Trost has recently reported the use of vinylogous ester and thioester derivatives in enantioselective decarboxylative allylation using a chiral bis(phosphine)-Pd(0) complex: Trost, B. M, Bream, R. N, Xu, J. Angew. Chem, Int. Ed. 2006, 45, 3109-3112
    • Trost has recently reported the use of vinylogous ester and thioester derivatives in enantioselective decarboxylative allylation using a chiral bis(phosphine)-Pd(0) complex: Trost, B. M.; Bream, R. N.; Xu, J. Angew. Chem., Int. Ed. 2006, 45, 3109-3112.
  • 26
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    • 2 led to significantly less conversion.
    • 2 led to significantly less conversion.
  • 27
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    • For convenience, the enantioselective allylation reaction with 13 was optimized in the opposite enantiomeric series.
    • For convenience, the enantioselective allylation reaction with 13 was optimized in the opposite enantiomeric series.
  • 29
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    • A separate experiment revealed no reactivity in the absence of a Pd(0) catalyst.
    • A separate experiment revealed no reactivity in the absence of a Pd(0) catalyst.
  • 30
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    • For preliminary results on the rate acceleration of enantioselective decarboxylative allylation of enol carbonates with electron-deficient PHOX ligands, see: Tani, K, Behenna, D. C, McFadden, R. M, Stoltz, B. M. Org. Lett. 2007, 9, 2529-2531
    • For preliminary results on the rate acceleration of enantioselective decarboxylative allylation of enol carbonates with electron-deficient PHOX ligands, see: Tani, K.; Behenna, D. C.; McFadden, R. M.; Stoltz, B. M. Org. Lett. 2007, 9, 2529-2531.
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    • 1H NMR .
    • 1H NMR .
  • 32
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    • For the isolation of laurencenone B (7) from the marine alga Laurencia obtusa, see: Kennedy, D. J.; Selby, I. A.; Thomson, R. H. Phytochemistry 1988, 27, 1761-1766. Neither the absolute configuration nor the optical rotation was specified.
    • (a) For the isolation of laurencenone B (7) from the marine alga Laurencia obtusa, see: Kennedy, D. J.; Selby, I. A.; Thomson, R. H. Phytochemistry 1988, 27, 1761-1766. Neither the absolute configuration nor the optical rotation was specified.
  • 33
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    • For the preparation of (+)-laurencenone B ((+)-7) via the degradation of elatof (1), see: Brennan, M. R.; Erickson, K. L; Minott, D. A.; Pascoe, K. O. Phytochemistry 1987, 26, 1053-1057.
    • (b) For the preparation of (+)-laurencenone B ((+)-7) via the degradation of elatof (1), see: Brennan, M. R.; Erickson, K. L; Minott, D. A.; Pascoe, K. O. Phytochemistry 1987, 26, 1053-1057.
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    • 11C NMR data for semisynthetic (+)-laurencenone B ((+)-7) (ref 17b) matched that of our synthetic material. See the supporting information for a detailed comparison.
    • 11C NMR data for semisynthetic (+)-laurencenone B ((+)-7) (ref 17b) matched that of our synthetic material. See the supporting information for a detailed comparison.
  • 35
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    • Purification of α-bromoketone 10 was hampered by its poor stability to silica gel and reverse phase HPLC.
    • Purification of α-bromoketone 10 was hampered by its poor stability to silica gel and reverse phase HPLC.
  • 36
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    • Determined by quenching the reaction at -78°C in a separate run, resulting in the isolation a 3.9:1 mixture of alcohol diastereomers favoring i. (Chemical Equation Presented)
    • Determined by quenching the reaction at -78°C in a separate run, resulting in the isolation a 3.9:1 mixture of alcohol diastereomers favoring i. (Chemical Equation Presented)
  • 37
    • 38349133076 scopus 로고    scopus 로고
    • D value for the synthetic material would be +95.5°, which differed from the observed value by 3.6%.
    • D value for the synthetic material would be +95.5°, which differed from the observed value by 3.6%.


* 이 정보는 Elsevier사의 SCOPUS DB에서 KISTI가 분석하여 추출한 것입니다.